Azazel

Names

Names this 'character' is known by both in fandom and canon:

• The Demon (all Winchesters refer to it thus in Season 1)
• The Yellow-Eyed Demon (Dean refers to it thus in Season 2)
• Celine Demon (a nickname used by the fans. See below for an etymology of this nickname)

The Demon

• The Demon attacks families on the night the baby is exactly 6 months old. (Jess is the exception to this rule - Sam is 22 & 6 months old.)

• A week prior to the attack, the geographical area has cattle deaths, electrical storms and temperature fluctuations.

• It makes clocks stop, and electical devices go haywire.

• It is impervious to Holy Water

• Following what appears to be a surge of activity around the time Mary died (Max's mother was also killed around this time), the Demon was dormant until late 2005.

• It has yellow eyes (iris and pupil).

• It possesses human hosts, but can exist in a disembodied form also.

• Impervious to the salt barrier.

• It is vulnerable to the Colt.

The Demon's Children

• Include: Meg (S1), Tom (S1), Duane (S2)

• Possess human hosts, are able to animate the human body it is possessing even if the body sustains mortal injury.

• Eyes turn entirely black during possession, though this can seemingly be turned on and off.

• They are impervious to hallowed ground ("that may work in the minor league, but not with me" - Meg, Salvation), but not to Holy Water.

• They can be exorcised and thus destroyed.

• Possession can occur by physical contact.

• Restricted by the salt barrier.

• Vulnerable to the Colt.

Etymology of the "Celine Demon" nickname

The term Celine Demon has been coined on the TWOP boards on September 14th, 2005, in a discussion after the airing of the 1.01 Pilot (episode) and means the demon, who killed the Winchester brothers' mother Mary Winchester.

It derived from a misreading of the words Ceiling Demon as Celine Dion (Canadian popsinger) by TWOP-user thinkcwik. The singer's name and the nickname for the demon were meshed and the new term stuck.